Process of coating wire with other metal



J. COFFIVN.l

PatentedJuly 7,1891.v

E. v I

l l)I EIllll IIIIH IIIIH III JNI/ENTOR.

(No Model.)

PROCESS 0F GOATTNG WIRE WITH OTHER METAL.

UNITED -STATES `PATENT EEICE;

.Ion-N ooEE1N, oE .I orINs'rowN,` PENNSYLVANIA, AssIGNoE 'ro THE cAMBRIA IRoN COMPANY, on PENNSYLVANIA PROCESS-'0F o'oATlNc WIRE. WITH o T'HER wis-riti;`

SPECIFICATION forming par@ of Letters Patent No.455,529," 1ated rulj'r' 7, 1891.

f Application sied March 16,1889. sesam. 303,519. 'momenti To all whom it majoor/,cerne Be itknown that I, JOHN COFFIN, a`citizen of the United States, residing at J ohnstown,a

in the county of Cambria and. State of Penn- Sylvania, have invented certain new and useful Improvements inthe Process ot Coating Wire with other Metalsgand I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it-v appertains to make and use the saine.

I cost of plating wire by vmaking it possible to' 2 0- My invention relates to an improvement in the process 4of coating wire with metal, comL Inonly called fgalvanizing and relates more especially to an improved method of preheating the wire prior to its passage through the plating metal.

llt-.e object of my invention is to reducethe run at an increased speed and by using a small- -er platin g-bath, whereby an economy is effected in the amount otplating metal wasted, and the further obj ect of my invention is to accomplish the plating in a superior manner, as

will be set forth.

Preheating wire to be coated has been heretofore practiced. I know'of two meth.'-

through the plating-bath. f T gravel or scouring material on'.4

ods of preheating which have been resorted to. In the first method the wire passes through a tubular heating-chamber prior toits entrance into the plating metal.v In the other .method the wire passes through a bath of molten lead prior to itsentrance into vthe plating metal. In my improved' process thel wire, after passing through tli leaning acid, passes through a mass of h other scouring material, and th eectually scour and clean fit at. a time when `the acid is being driven off'; and is rendered most active by the heat. l'While thejscouring action of the gravel is most efficient at this time, still the scouring action continues,- thoughin lesser degree, until the wire emerges from the preheating bath at a temperature suitable to its rapid and thorough coating while passingthrough the plating-bath.

The apparatus I use to carry my invention into'effect consists in an acid-tank, through which the wire passessuitable `guides over throughout.

' which passes, a fpreheat-ingspan, and a tank V contain inglnolten zincor'other plating metal.`

'Ihe-f-preheatinggpan consists in a tirelbrick construction havingva bottom and twosid'es. 5 5- The" bottom is 'made ot. ,thin brick supported bylongitudinal walls and the sides are formed 'by brick walls. The bottomv of the panis in clined toward the end-atwh'ich thewires enter. The object of this incline is tp-more effectively hold the grave-l,l as the/advancing 'wires tend to vcarrythe gravel .with them.

close yto the bottom thereof. Fire is applied to the under side of the brick bottom and heals the mass of gravel through this bottom. At the epd of the panwhere 'the wires enter a dam. composed of brick bolted together is placed across the pan, leaving sufficient s paee between the dam .and the bottom of the pan for the wires to pass. The objectofthis-dam is to prevent the grayel from coming ontfof the operator is leveling it with as hovel. To make myinvention more clear, I will now refer to the annexed sheet vot drawings, which forms part. 'of this specification, in

which- Figure 1 is aplan of my invention, and Fig. 2 a longitudinal sectional elevation thereof. Like letters of reference refer tolike 'parts A is the acid-tank through which thefwire `passes,.a being'the sinker contained therein;

B represents'a stand ef driven rolls'gfwniieh form guides for the Wireaterit-emerges from the acid and prior to its entrance into-the.pre'

heater. .C is the preheater.

c' represents thfe'bottom thereof,and c" ther side walls; curved, as shown in Fig.. 2.

burners are 4applied 'to heat "thebottorn of 8o the end of the pan either by gravity or when The bottom'c: is-inclinedand I u roo c2 represents theringplaces, {wheregasthe pan, and c3 represents the smoke-stack through which the products of combustion pass, f

c4 represents a dam composed oi lire-bricks bolted together, as shown in Fig. l and placed c of the pan extends slightly past the main body of the pan,as shown in .the drawings, terminating about over the center of the screen c5. As the wires slightly work along the gravel, it falls on the screen c5, which screen separates the clean gravel from the small particles which have been worn oft in scouring the wire, whereupon 'an operator shovels it up from the oor and places it in the pan against the dam c4.

D represents the bath of plating metal, and d the sinker located in this bath.

JV represents a wire in transit, the arrows indicating the direction it travels.

It is understood that a series of wires pass through the bath at the same time. The wire as it leaves-the preheatingbath may be at a temperature of 4000 Fahrenheit. l I have used various kinds of gravel.

Vashed sea-gravel gives excellent results;l

but I believe I have attained the best results by using crushed ganister, which is prepared by rst crushing, then sifting and Washing. 'lhe size of gravel I prefer is that which will pass through a No. 3 sieve, but not through a No.y 20.

The apparatus for coating wire which is used in connection with my above-described process is made the subject of vanother application for Letters Patent, Serial No. 303,520.

Having fully described my invention, what I claim as my invention, and wish to secure by Letters Patent, isv 1. In the process of coating wire with other metal, the improvement consisting in first passing the wire through an acid bath; second, through a bath Aot hot gravel or other equivalent scouring material, and finally through a bath of molten Zinc or other coating metal, substantially as specified andvset forth. p

2. In the process of coatingwire with other metal, the improvement consisting infiirst passing the wire through a bath of acid; second, through a hot bath of crushed ganister,

and finally through a bath of plating metal, p

substantially as speciiied and set forth.

In testimony whereof Ialiix my signaturein presence of two witnesses. y

JOHN (TOFFIN. lVtnesseS: l

SIDNEY POSTLETHWAITE, CYRUs ELDER. 

